Main Relay (Computer/Fuel System): Testing and Inspection

1UR-FE ENGINE CONTROL: RELAY: ON-VEHICLE INSPECTION

1. INSPECT INTEGRATION RELAY (IG2)

(a) Measure the resistance of the IG2 MAIN fuse.

(1) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





If the result is not as specified, replace the IG2 MAIN fuse.

(b) Measure the resistance of the ignition relay No. 2 (IG2) circuit.





(1) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





If the result is not as specified, replace the integration relay.

2. INSPECT INTEGRATION RELAY (EFI)

(a) Measure the resistance of the EFI No. 1 fuse.

(1) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





If the result is not as specified, replace the EFI No. 1 fuse.

(b) Measure the resistance of the EFI MAIN relay circuit.





(1) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





If the result is not as specified, replace the integration relay.

3. INSPECT INTEGRATION RELAY (A/F)

(a) Measure the resistance of the A/F fuse.

(1) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





If the result is not as specified, replace the A/F fuse.

(b) Measure the resistance of the A/F sensor heater relay.





(1) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





If the result is not as specified, replace the integration relay.

4. INSPECT FUEL PUMP RELAY (F/PMP)

(a) Measure the resistance according to the value(s) in the table below.





Standard Resistance:





If the result is not as specified, replace the fuel pump relay.